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Production of metabolic and waste products by intensively farmed rainbow trout, Salmo gaivdnevi Richardson
Author(s) -
Clark E. R.,
Harman J. P.,
Forster J. R. M.
Publication year - 1985
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1985.tb03187.x
Subject(s) - rainbow trout , biology , nitrate , salmo , fish farming , zoology , phosphate , ammonia , urea , fishery , pollutant , biomass (ecology) , suspended solids , aquaculture , wastewater , environmental chemistry , fish <actinopterygii> , ecology , environmental science , environmental engineering , chemistry , biochemistry
The pollution production rate as measured by the increase in the amounts of ammonia, phosphate, nitrate, urea, and faeces in an intensive fish farm is described and is related to the amount of food fed per day or the biomass weight. Pollution production varied with fish size. Main pollutants produced per kg food fed per day were ammonia 31–37 g; phosphate 5.2–5.9 g; nitrate 9–15 g and suspended solids 40–9O g. Expressed as g kg −1 fish produced per day ammonia ranged from 0.3–0.8 g; phosphate 0.067–0.17 g; nitrate 0.13–0.21 g and suspended solids 0.80–0.94 g. These rates differ from those reported in previous studies and these differences may be attributed to the design of the Shearwater farming system which involves self cleaning, intensively stocked tanks, a system which ultimately gives a more accurate assessment of pollution rates.